<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script type="text/javascript">
			console.log(Date.prototype)
			var a = [3,4,56];
			Array.prototype.db = function(){
				console.log("我是数组的原型对象的函数")
			}
			
			a.db();
			a.db();
			a.db();
			a.db();
			
			console.log(Array.prototype.constructor.prototype==a.__proto__)
		</script>
	</head>
	<body>
	</body>
</html>
